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revision 1.1822 by mlosch, Tue Feb 12 07:51:02 2013 UTC revision 1.1860 by mlosch, Wed May 1 09:20:10 2013 UTC
# Line 4  $Name$ Line 4  $Name$
4      Notes on tags used in MITgcmUV      Notes on tags used in MITgcmUV
5      ==============================      ==============================
6    
7    o pkg/exf ALLOW_RUNOFTEMP
8      - if defined,  river and glacier runoff temperature can be read-in from
9        runoftempfile; runoftempfile needs to have same format as runofffile
10    o pkg/thsice (& pkg/bulk_force):
11      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
12        for energy content of Precip + RunOff & Evap (like with pkg/exf).
13      - change computation domain to always be the interior (without overlap).
14      - fix bug (wrong overlap) when using EXF and stressReduction > 0.
15    o verification/tutorial_global_oce_biogeo:
16      - add preliminary OpenAD setup (still has problems)
17    o pkg/seaice:
18      - turn some parameters for choosing the convergence criterion of
19        the inexact Newton method (JFNK) into runtime parameters for convenience
20      - clean up seaice_calc_viscosities.F: remove/retire two options for
21        SEAICetaZmethod (1,2), introduce area weighting for method 3; this changes
22        the results of lab_sea/input because a division has been replaced by
23        a multiplication with the reciprocal (sumNorm)
24      - modify offline_exf_seaice/input.dyn_jfnk/data.seaice to improve
25        convergence of solver (changes results, of course), and to test some
26        new features
27    o model/src:
28      - remove unused (since Aug 2006) S/R SET_WRITE_GLOBAL_PICKUP and its call.
29      - remove unused forcing field "dQdT" and associated parameter "dQdTFile".
30      - move forcing adjustment (balancing surface forcing) in specific S/R
31        where might also be applied exchanges (if needed) to forcing arrays.
32    o pkg/shelfice:
33      - allow to specify the Ice-Shelf mass per unit area (instead of
34        shelficeLoadAnomaly) and do the conversion from one to the other
35      - move loading from file of shelficeLoadAnomaly from SHELFICE_INIT_VARIA
36        to SHELFICE_INIT_FIXED: (a) avoid some TAF recompution issues and
37        (b) will be loaded in time (before calling INI_PRESSURE) in case it is
38        needed in phi0surf for initial pressure calculation when useDynP_inEos_Zc
39      - update isomip experiment forward output (get machine truncation error
40        from conversion shelficeLoadAnomaly -> shelficeMass -> shelficeLoadAnomaly)
41    o verification/offline_exf_seaice:
42      revise data.seaice in input.thermo and input_ad and update results accordingly
43        HO = 0.2, SEAICE_areaLossFormula = 2,
44        SEAICE_growMeltByConv = .TRUE.,
45        SEAICE_doOpenWaterMelt = .TRUE.,
46      Improve consistency with input.thsice and fix the spurious 500m ice corners
47    o verification/global_ocean.cs32x15:
48      - set Energy Reference Level to liq. water @ 0 degC: temp_EvPrRn=0.,
49        in icedyn (thsice+seaice-dyn) test and update output.
50    o verification/offline_exf_seaice:
51      - adjust list of tested variables (with testreport) and update
52        standard test output with better slection of monitored fields.
53    o pkg/cd_code:
54      - swtich off Adams-Bashforth on the 1rst iteration. Update output of
55        experiment lab_sea.hb87
56    o tools/genmake2:
57      - change default makedepend from the system default to tools/xmakedepend:
58        When no makedepend is specified, select tools/xmakedepend it the test pass,
59        otherwise select the system default (if exist and pass the test) or
60        try to build cyrus-makedepend ; stop if none of the 3 works.
61    o pkg/exf & pkg/thsice:
62      - In case Energy-Reference-Level (ERL) is used (temp_EvPrRn=0), account
63        for energy content of Precip + RunOff & Evap. Assumes:
64       1) Rain has same temp as Air.
65       2) Snow has no heat capacity (consistent with seaice & thsice pkgs)
66       3) Run-Off comes at the temp of surface water (with same Cp)
67       4) Evap over ocean is released to the Atmos @ surf-temp (=SST); should be
68        put directly into Latent Heat flux & should use water-vapor heat capacity.
69       5) Evap over snow/seaice (pkg/thsice) assumes constant Lf+Lv (consistent
70        with snow having no Cp) => water vapor is released to Atmos @ 0^oC (=ERL).
71    o pkg/seaice: simplify the use of CPP flags in JFNK-related files
72        (compile when SEAICE_ALLOW_JFNK is defined)
73    o pkg/thsice:
74      - fix oceanic flux diagnostics & timeave (left from new sequence of calls
75        implementation): move THSICE_AVE call after the advection (called directly
76        from thsice_do_advect.F).
77    o verification/global_ocean.90x40x15 and OpenAD:
78      New experiment for OpenAD is identical to the one in input_ad except that
79        multiDimAdvection=.FALSE.,
80      There is still an issue with this.
81    o pkg/thsice:
82      - account for ice velocity (ocean relative velocity) in turbulent heat flux
83        at the base of the ice; update output of global_ocean.cs32x15 (icedyn)
84        and offline_exf_seaice (main test).
85    
86    checkpoint64f (2013/03/31)
87    o verification/OpenAD:
88      - new (smaller, without OAD_DEBUG) output_oadm.txt generated using gfortran.
89    o verification/isomip, pkg/shelfice and OpenAD:
90      - add OpenAD setup to this exp and make shelfice package work with OpenAD
91    o verification/tutorial_global_oce_biogeo:
92      - update AD and TLM output after turning off ALLOW_FE (in DIC_OPTIONS.h)
93    o verification/offline_exf_seaice:
94      - replace adjoint experiment (now similar to fwd input.thermo/ setup).
95    o verification/tutorial_tracer_adjsens, pkg/ptracers and OpenAD:
96      - add OpenAD setup to this exp and make ptracers package work with OpenAD
97    o pkg/seaice/seaice_evp.F:
98       mask the asymmetric contribution of the ice-ocean stress (when
99       the turningAngle is non-zero) over open water to avoid stripes
100       in the EVP-solutions after many EVP-substeps. This does not change
101       the verification experiment (because turningAngle=0 in that experiment),
102       but will affect other EVP solutions with turningAngle.ne.0
103    o verification, AD & TLM output:
104      - new TAF version 2.3.10 (previously 2.3.8) add more parenthesis in multiple
105        additions and multiplications which affect results at machine truncation
106        level. Update few AD output (1D_ocean_ice_column, bottom_ctrl_5x5,
107        lab_sea.noseaicedyn & offline_exf_seaice) and TLM output
108        (1D_ocean_ice_column & tutorial_tracer_adjsens.som81) which had only 12
109        digits of matching.
110    o pkg/seaice:
111       modify lsr-algorithm so that it vectorizes AND converges by using a
112       "zebra" method: split vector loop into two with step size 2; this
113       solves a general convergence problem for the JFNK solver on a vector
114       computer. It has the potential to even improve convergence for
115       non-vector machines, but it does change the results so it is turned
116       off by default. To turn on define CPP-flags SEAICE_VECTORIZE_LSR and
117       SEAICE_VECTORIZE_LSR_ZEBRA in SEAICE_OPTIONS.h
118    
119    checkpoint64e (2013/03/05)
120    o pkg/ecco and several verification experiments:
121       Remove special versions of the_model_main.F, the_main_loop.F, forward_step.F
122       from ecco package, and revert to unified routine in model/src/
123       Adjust verification experiments accordingly, especially gloal_oce_llc90
124       Should conclude long-standing work by Gael to reconsile the_main_loop with
125       ECCO and will enable OpenAD's revolve loop in ECCO setup.
126    o pkg/generic_advdiff:
127      - implement compressible flow method for multi-dim advection (similar to
128        gad_som_advect.F); add new option "GAD_MULTIDIM_COMPRESSIBLE" (since
129        TAF generates many recomputations) to use it; no yet coded with implicit
130        vertical advection.
131      - change experiment advect_cs (new output) and advect_xy (same output)
132        to test compressible flow multi-dim advection.
133    o pkg/generic_advdiff:
134      - fix SOM advection for unusual cases (linear Free-Surf in r*, other
135        cases where linear Free-Surf is not @ k=1, e.g., useShelfIce)
136    o pkg/seaice:
137      - fix bug in the no-slip implementation in seaice_calc_strainrates.F, this
138        bug affects two verification experiments (lab_sea and lab_sea.hb87),
139        recover old (wrong) results by setting noSlipFac = 2. in
140        seaice_calc_strainrates.F;
141      - add another averaging method for etaZ (etaZmethod=3), a mix of 2 and 0
142      - add runtime parameter SEAICE_JFNKepsilon for that finite difference
143        gradient in the Jacobian times vector operation (s/r seaice_jacvec)
144      - fix line search in seaice_jfnk.F (s/r seaice_jfnk_update)
145    o pkg/seaice: reorganize seaice_lsr.F to be able to reuse more code:
146      - new subroutines seaice_lsr_tridiagu/v
147      - introduce loop bounds i/jmin/max to be able to use a restricted
148        additive Schwarz method, but not used for now.
149      - rename SEAICE_CALC_LSR_COEFFS into SEAICE_LSR_CALC_COEFFS
150      - use new subroutines seaice_lsr_tridiagu/v in s/r seaice_preconditioner
151    o OpenAD support
152       Reorganize S/R call for overall time-stepping loop to facilitate
153       OpenAD revolve loop replacement
154       (new S/R main_do_loop.F)
155    o model/src:
156      - add 3-D array 3rd dimension to argument list of S/R ADAMS_BASHFORTH2/3;
157      - pkg/cheapaml: remove local S/R ADAMS2d and use instead standard S/R
158        ADAMS_BASHFORTH2.
159    o pkg/cheapaml:
160      - add new parameter (default=F, same as before) to disable full domain
161        (including land) periodicity in X & Y dir.
162      - new S/R CHEAPAML_COPY_EDGES to copy relaxation field into edges of
163        prognostics field ; merge the 2 S/R cycle_2d_tracer and timestep_2d_tracer
164        into single S/R CHEAPAML_TIMESTEP.
165    
166    checkpoint64d (2013/02/17)
167    o pkg/monitor (angular momentum):
168      - do not add Eta contribution to the total AM if using rigid-lid;
169      - correct for Adams-Bashforth in zonal-wind part (instead of in AM_eta).
170      - horizontal discretisation: compute Zonal wind contribution separately for
171        each component (instead of from cell centered averaged) and use the 4
172        grid-cell corner averaged value of Omega*(R*cos_Phi)^2 in AM_eta part.
173      - Check that AM is conserved with linear dynamics (momAdvection=F and linear
174        FreeSurf) if using vectorInvariant momentum.
175    o model/src (horizontal grid):
176      - move initialisation of all horizontal grid arrays to null value
177        from specific horizontal grid S/R to main S/R INI_GRID;
178      - add 2 new arrays to project model C-grid velocity on to zonal direction
179        (similar to AngleCosC & -AngleSinC but at U and V point location) and
180        compute them in S/R CALC_GRID_ANGLES.
181    o pkg/seaice: replace a hard coded parameter by a runtime parameter
182        SEAICE_JFNK_tolIter
183    o pkg/seaice: introduce a restricted additive Schwarz (RAS) method in
184        preconditioner for JFNK (run LSR into the overlaps as far as possible,
185        i.e OLx/y-2, but overwrite the solution in the overlaps)
186      - extend loop range in seaice_calc_viscosity
187      - add new parameters SEAICE_OLx/y (default = OLx/y-2)
188      - add flexible loop ranges to seaice_preconditioner, seaice_calc_lsr_coeffs
189      - slightly modify loops in tridiagonal solver lsr-preconditioner
190      - by default remove the extra exchange in seaice_preconditioner with a
191        replacement of an undocumented CPP flag by SEAICE_PRECOND_EXTRA_EXCHANGE
192      - modify offline_exf_seaice so that old results without RAS are reproduced
193        for output.dyn_jfnk.txt
194      in seaice_fgmres.F (unrelated to RAS)
195      - add a cpp-flag option for a re-ordered mapping (potentially more
196        efficient), but because this changes the results, turn it off by
197        default
198      - replace the save statement by local common blocks
199    o utils/matlab:
200      - fix tile-offset in rdmnc.m when output was produced using EXCH2.
201      - update cs_grid/bk_line scripts to use load_grid.m (in utils/matlab)
202        instead of local script "load_cs.m".
203  o pkg/seaice:  o pkg/seaice:
204    - fix a serious bug in seaice_fgmres.F, s/r seaice_scalprod, connected    - fix a serious bug in seaice_fgmres.F, s/r seaice_scalprod, connected
205      to the scalarProductMetric and the unrolling. By chance this does not      to the scalarProductMetric and the unrolling. By chance this does not
206      change the verification experiment, because of the particular domain      change the verification experiment, because of the particular domain
207      decomposition      decomposition
208  o pkg/diagnostics:  o pkg/diagnostics:
209    - change default missing_value from UNSET_RL to -999.    - change default missing_value from UNSET_RL to -999.
210  o pkg/layers: improve vectorization of layers_fluxcalc.F  o pkg/layers: improve vectorization of layers_fluxcalc.F
211    - step 1: split loops, make TatU/V 2D arrays. This alone reduces the cpu    - step 1: split loops, make TatU/V 2D arrays. This alone reduces the cpu
212      time spent in this routine by more than a factor of 3 on an NEC-SX8      time spent in this routine by more than a factor of 3 on an NEC-SX8
213    - step 2: replace search algorithm by a bisection algorithm found in    - step 2: replace search algorithm by a bisection algorithm found in
214      Press et al. Numerical Recipes in Fortran. This algorithm can be      Press et al. Numerical Recipes in Fortran. This algorithm can be
215      vectorized and finds the correct bin in approx. log2(Nlayers) steps.      vectorized and finds the correct bin in approx. log2(Nlayers) steps.
216      For now, use this algorithm only for TARGET_NEC_SX defined.      For now, use this algorithm only for TARGET_NEC_SX defined.
217    - moved the search algorithm into a separate subroutine, that is kept    - moved the search algorithm into a separate subroutine, that is kept

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